News: Thankfully, those of us with jobs will be at work and won't notice.
Microsoft has announced that Xbox Live and Xbox.com will be down for maintenance next Tuesday, March 27. The outage will begin at 3 AM Eastern Time and last roughly fourteen hours (let's say 5 PM or so). It's possible the downtime could be shorter and it's possible it could be longer. Oh Microsoft, you and your sneaky usage of the word "approximately."
According to Microsoft, users attempting to log in to the service will see a "'We're down for maintenance'" page on Xbox.com and a similar message on your Xbox console." MS was also quick to mention that this is not the Spring Dashboard update, that's coming later. This is supposedly "routine under-the-hood maintenance that was scheduled months ago."
Still have more questions? Microsoft has answers (and a list of other things you could be doing) at Xbox.com